OVERVIEW

Official designation: Haag + Zeissler 7501 (7501 Series, Rotary Joint)

Role/Application: Single-passage rotary joint designed for reliable transfer of air, vacuum, and hydraulic oil in pneumatic and hydraulic applications, offering a wide range of connection sizes and speeds.

KEY SPECS SUMMARY

Power: N/A

Interfaces / Ports: Single flow; G or NPT thread (varies by model/revision)

Indicators: N/A

Operating Temp: Maximum 130 degrees C for water (other media varies)

Platform / Compatibility: Aluminum, brass, or stainless steel housing; carbon graphite/silicon carbide seal

Limit: 50 bar maximum pressure (DN 6-DN 32); 3500 rpm maximum speed (DN 20)

Lifecycle: Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum pressure rating for the DN 50 (2 inch) connection size in the 7501 series?

A: The maximum pressure for the DN 50 (2 inch) connection size is 40 bar.

Wiring & Installation:

Q: What is the highest rotational speed supported by the 7501 series for the smallest connection sizes?

A: The maximum speed for DN 6 to DN 20 (1/8 inch to 3/4 inch) sizes is 3500 rpm.

Troubleshooting & Compatibility:

Q: What are the common housing materials available for the 7501 series rotary union?

A: The 7501 rotary joint is manufactured with aluminum, brass, or stainless steel housing designs.

Replacement & Upgrades:

Q: Does the 7501 series support the ability to provide both fluid supply and drainage (double flow)?

A: The 7501 series is a single flow design but can be adapted for double flow with a syphon pipe.